Cal. Government Code § 3506.5

A public agency shall not do any of the following: (a) Impose or threaten to impose reprisals on employees, to discriminate or threaten to discriminate against employees, or otherwise to interfere with, restrain, or coerce employees because of their exercise of rights guaranteed by this chapter. (b) Deny to employee organizations the rights guaranteed to them by this chapter. (c) Refuse or fail to meet and negotiate in good faith with a recognized employee organization. For purposes of this subdivision, knowingly providing a recognized employee organization with inaccurate information regarding the financial resources of the public employer, whether or not in response to a request for information, constitutes a refusal or failure to meet and negotiate in good faith. (d) Dominate or interfere with the formation or administration of any employee organization, contribute financial or other support to any employee organization, or in any way encourage employees to join any organization in preference to another. (e) Refuse to participate in good faith in an applicable impasse procedure.